Lamp-stove



(No Model.) 2 Sheets-Sheet 1.

0. A. STEMPEL.

LAMP STQVB. lNo. 371,152. Patented Oct. 4, 1887. @152m 1 l? M N 1 2 II...1I- Il 2 Sheets-Sheet 2.

(No Model.)

O. A. STBMPEL.

LAMP STOVE.

Patented 001;. 4, 1887.

UNITED STATES PATENT OFFICE.

OMAR A. STEMPEL, OF ST. LOUIS, MISSOURI.

LAM P-STOVE.

SPECIFICATION forming part of Letters Patent No. 371,152, dated October4, 1887.

Application tiled January 31,1857.

To all whom it may concern,.-

Beit known that I, OMAR A. STEMPEL, of the city of St. Louis, in theState of Missouri, have invented a certain new and useful ImprovementinLamp-Stoves, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings, formingpart of this specification, and in which- Figure I is a side elevationof my combined apparatus with part of the lamp-chimney broken away,showing the outer case of the radiator, the glass boiler, pendentheating-tubes, and the lighted lamp beneath the tubes. Fig. II is avertical section ofthe radiator'and cooker on line II V, Fig. I, showingthe chambers of the oven in operative position and the radiator-ilueswith the course ofthe steam through them. It also shows the air-vent forthe escape of the dead air as the fines become surcharged with steam.Fig. III is a horizontal sectionV on line III III, Fig. I, showingbottom of `the cooker and radiator, and also the rotary damper and meansfor supporting and operating it. Fig. IV is a horizontal section on lineIV IV, Fig. I, looking downward, and shows the entrance to the U-shapedheatingtubes secured in a pendent position' from the boiler. Fig. V isan enlarged detail section on line II V, Fig. I, showing the boiler withthe steam-tight threaded joints of its metallic end plates and therubber packing-rings that tighten the joints. Fig. VI is a perspectiveview of one of the semi-annular ovens and stewing-chambers removed fromthe radiator and a like view of one ofthe shelves removed from itsplace, and also shows thesemicircular perforations in the side of theoven for the ingress of the heated air and the manner in which thesemicircul-ar pieces cut therefrom are bent down and thus utilized asbracketsupports for the shelves. Fig. VII is an enlarged horizontalsection taken on the line VII VII, Fig. II, showing the vertical steamue(in the middle of the radiator) that receives the steam from the boiler,the transverse or T line that snrmounts it, and the annulus or annularflue into which the T-ue discharges. It also shows, in dotted lines, thecourse of the interradiate dues that carry back' the steam from theannulus to the base of the central vertical due.

\ described, and pointed out Serial No. 226.079. (No modeLl Theinvention is a portable apparatus with a combination of devices forcooking, heating, and illuminating purposes; and it consists in featuresof novelty hereinafter fully in the claims.

Referring to the drawings, in which similar figures indicate like partsin all the figures, I represents. the radiator of my combined apparatus,and 2 2 are duplicate semi-annular ovens and stewing-chambers, which areprovided with shelves 3 and apertures 4, through which the radiated heatcan enter.

5 5 represent the standards or legs that support the radiator. The feet6 of these standards are preferably secured to the platform 7, but canbe seated on the tloor, table, or any other suitable place where it isdesired to set the apparatus.

8 represents a lamp, which may be of any usual construction suitable forsuch purposes, and is seated on the platform between 4the standards.

9 is the burner, which is adapted for burning gasoline or any othersuitable illuminant, and carries a broad glass chimney, 10, within whichhang the pendent heating-tubes Il ,that communicate with and passthrough perforations 12 in the metallic bottom plate, 13, of the boiler14, to which bottom plate said tubes are securely soldered and throughwhich they have intercommunication with the boiler. The said bottomplate is surrounded by a vertical flauge, 15, in which is impressed aninternal screw-thread, 16.

The vertical circumferential side V17 of the boiler is constructed ofglass, and is preferably of a globular form, with shoulders 18 18 aboveand below. Seated against these shoulders are dat rubber rings 19 19,and projecting vertically from said shoulders there are screwthreadedextensions 20 20, the lower one of which engages in the before-mentionedscrewilange of the bottom plate-until the periphery of the flange fitsand embeds itself in the rubber packing-ring that is seated under thelower shoulder. The cap-plate 2l of the boiler, in its outerconformation, is almost a duplicate of the bottom plate, having asimilar screwthreaded flange, 22, that engages in the threaded extensionon the upper shoulder of the vertical side piece of the boiler andembeds itself in the flat rubber packing-ring that IOO is seated on thesaid shoulder, forming steamtightjoints above and below.

The cap is perforated at 23, and a vertical flue, 24, that ts in saidperforation, is securely soldered to the cap, and rises through theintervening space between the boiler and the case of the radiator andpasses up through the center of said radiator to the top thereof, whereit unites with a transverse or T tube, 25, that connects with an annulusor annular flue-chamber, 26, of said radiator between its outer casing,27, and inner ease, 28. The said annulus or annular flue connects by aseries of interradiate dues, 29, at the bottom of the radiator with thecentral due near its base. A vent-tube, 30, taps the annular iiue at itsbase to let off the dead air, as will hereinafter more fully beexplained. lt is provided with a slidevalve, 3l.

32 represents a rotary damper that works against the bottom plate, 83,of the radiator, and is held in position by the central duepipe, 24, andheaded stop-pins 34, (see Fig. IIL) thatengage in circumferential slots35 near the periphery of the damper. The damper is pierced with radialopenings 36, that correspond withl openings 37 through the bottom plateof the radiator when the damper is in its open position, the dampercovering them when it is closed. Pendent lugs 38 are provided to turnthe damper.

39 represents a safety-valve, which is controlled by a lever, 40,provided with an adjustable sliding weight, 41.

Each section of the semi-annular oven 2 is provided with handles 42, bywhich they can be lifted from the radiator. Two semicircular top plates,43, to the oven sections center and tightly fit on the T-tlue, andtogether form the top of the radiator when the ovens are seated therein.Together with the slightlyelevated outer casing, 27, of the radiatorthese top plates form a griddle-pan.

lIhe operation of theinvention is as follows: The bottom plate of theboiler, with its pendent heating-tubes, is screwed onto the glass globeof said boiler, the upper periphery of its ange embedding itselfinto'the rubber packing-ring beneath the lower shoulder of the globe.(See Fig. V.) A suitable amount of water is then poured into the boiler,filling the heating-tubes and to the requisite height in the boiler, andit is then screwed into the threaded iiange of its cap until theperipheral edge of said flange embeds itself in the upper packingring.The joints and connections with the radiator-dues are thus madesteamtight. Thelampnndertheboiler-tubes,which has been supplied withgasoline, coal-oil, or other suitable illuminant, is then lighted, andas the water heats in the tubes it rapidly changes place with the denserwater in the glass boiler above, and thus keeps up a livelyreciprocating movement until the water in the boiler has reached theboiling-point and is rapidly giving off steam. As the tubes are arrangedin pairs in U form, and as one limb of the tube will almost invariablybe more favorably situated to the influence of the flame than the other,it is evident that in such case the expansion and consequent rarefactionof the Water at the higher temperature Will eX- ceed in itsascension-power that of the other section of the tube, and together theywill have a tendency, in conjunction with the denser water in t-heboiler above, to generate a circuitous interchange of the duid, forminga continuous current.. Also, when the twin tubes are at an eventemperature, the raretied air with the generated steam will, in thatcase, simultaneously ascend in both tubes, the interchange not beingeffected, as in the former case, with as steady a current,butwith moreviolent ebullition, as with the boiling water within a kettle. The steamthat has been generated in the heatingtubes and boiler then ascendsthrough a central vertical flue within the raradiator-charnber, and oa atransverse flue at top of the radiator to an annular flue formed betweenan outer and inner casing around said radiator. The steam then returnsacross the bottom of the radiator through a series of small interradiantdues to its startingpoint at the foot of the central lue, the condensedproduct of the steam dripping back into'the boiler and the vapor withthat that has since been generated again ascending the central fine;When the steam first charges the iues of the radiator it drives the deadair before it until, on reaching the vent 30, it is forced out of theradiator; but after the expulsion of the dead air the weight of steamsoon exceeds that of the atmospheric pressure and closes the slidevalve31thereby stopping the escape of steam through the same. The glassboiler, being transparent, is its own gage. The said boiler is providedwith a safety-valve, 39, which is controlled by a weighted lever, theweight being adjustable to the pressure desired to be attained.

It will be seen that there are vertical openings between the side wallsof the corresponding sections of the oven and a horizontal openingbetween the bottom plates composing said sections. These openingsprovide a freer entrance for the heated air within the oven.

It will also be seen that the perforations in the circular wall of theoven-sections, which are also formed for inlets of the heated air, areformed by semicircular cuts in the plate, and when the inclosed metal isbent down inward it makes efficient bracket-supports for the shelves.

The rotary damper that works .beneath the bottom of the radiator orcooking-chamber is adjusted by two pendent lugs near its periphery toregulate the temperature while cooking and to facilitate the dispersionof the heated air when used as a heater.

When used as a cooker, the twin sections of the combined oven andstew-chamber are dropped down in their seats within the radiator, thearticles to be baked or stewed being previously placed in pans on theshelves.

IOO

table or suspended from the' ceiling.

When it is desired to roast or bake, but little Water is required in thepans, as when the oven-sections are in position the outer joints arenearly steam-tight. Consequently the delicate juices and flavors fromthe material being cooked are not largely wasted with the escapingvapor, as is too often the case in cookers with loose joints. Whenmaterial is to be stewed, a larger amount of water is placed in thepans.

There is very little waste steam, as, after making the circuit of theradiator-lines and passing @ict the interradiate pipes again into thebase of the vertical flue, the condensed product ofthe steam drips backinto the boiler by the force of its own gravity.

I have above described my invention in re` lation to its cookingdevices; but it has other and important functions, as a radiator forheating apartments and also for illuminating the same apartments afterdark.

When used as a heater, the ovens are withdrawn from the radiator andtherotary damper is turned round until the openings therein are coincidentin position to the openings in the bottom of the radiator. By thesemeans the heated rarefied air is rapidly discharged from the radiatorinto the apartment which it is required to heat; also as an illumiuatorin the same apartment, especially when placed on a As the lamp chimneyistransparent, ther-eis sufficient dissemination of light to illuminate alarge room.

The apparatus can be either set on the floor or on a table, or it can behung from the ceiling by the usual adjustable lowering devices byrunning the suspension-chains over pulleys. By this means the apparatuscan be lowered, even to the door if desired, to attend to the cooking,and afterward elevated out of the way.

I claim as my invention- 1. The combination of the inner casing, 28, andouter casing, 27, forming an annular chamber, 26, between them, and theduplicate semiannular ovens 2, provided with apertures 4 and the shelves3, substantially as described.

2. The combination of the inner casing, 28, and outer casing, 27 formingan annular chamber, 26, between them, the central vertical tube, 24, thetransverse tube 25, connecting the central tube with the annular chamberat the top, radial tubes 29, connecting the central tube with theannular chamber at the bottom, and the duplicate semi-annular ovens 2,provided with apertures 4 and the shelves 3, substantiall y asdescribed.

3. The combination of the radiator and a drop-oven, 2, havingsemicircular apertures 4, semicircular brackets 44, and shelvessupported on said brackets beneath the apertures, substantially asdescribed.

.4. The boiler comprising a globe, 17, having shoulders 18 andscrew-threaded flanges 20,the bottom plate, 13, having screw-threadedflange 15, a cluster-of tubes depending from the bottom plate, acap-plate, 21, having a screw-threaded Harige, 22, and pac'kingringslocated between the plates and the shoulders, substantially asdescribed. l 5. rlhe combination of the lamp, boiler, and a radiatorformed with an inner casing, 28, outer casing, 27, having openings inits bottom plate, and a rotary damper supported from the bottom plate,substantially as described.

OMAR A. STEMPEL.

BENJN. A. KNIGHT, SAML. KNIGHT.

